Fix flake8

django_migration_linter/cache.py

@@ -23,7 +23,8 @@ class Cache(dict):
     def __init__(self, django_folder, cache_path):
         self.django_folder = django_folder
         project_name = split_path(django_folder)[-2]
-        self.filename = os.path.join(cache_path, '{0}.pickle'.format(project_name))
+        self.filename = \
+            os.path.join(cache_path, '{0}.pickle'.format(project_name))
 
         if not os.path.exists(os.path.dirname(self.filename)):
             os.makedirs(os.path.dirname(self.filename))